LETTERBOX

Etymology

Adjective

letterbox (not comparable)

(film) Transferred to home video formats while preserving the original aspect ratio, having black bars above and below the picture area.

Noun

letterbox (plural letterboxes)

(chiefly, UK) A collection point for mail intended for onward delivery, a secure box or receptacle for this purpose.

(chiefly, UK) A delivery point for mail, a box, compartment or slot for this purpose.

A hidden container that holds a logbook and rubber stamp, found by following clues.

Synonyms

• (collection and delivery point): mailbox

• (collection point): post box

• (collection point): (UK) pillar box

• (delivery point): (US) mail slot

Verb

letterbox (third-person singular simple present letterboxes, present participle letterboxing, simple past and past participle letterboxed)

(film) To transfer a widescreen motion picture to home video formats while preserving the original aspect ratio, with the placing of black bars above and below the picture area.

To hunt for letterboxes (containers with logbook and rubber stamp) by following clues.

Source: Wiktionary